JP2008202562A - Scroll fluid machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scroll fluid machine in which a slight impact noise generated when the lower surface of the head part of an uplift prevention pin is collided with the upper surface of a balance weight is eliminated. <P>SOLUTION: An elastic member 39 is disposed between the lower surface of the head part 38b of the uplift prevention pin 38 loosely extending through a hole 34a drilled in the balance weight 34 and having an end engaged with the inner end large-diameter part 13b of a rotating shaft 13 and the upper surface of the balance weight 34. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a scroll type fluid machine used as a compressor or an expander.

As a scroll type fluid machine used as a compressor or an expander, for example, the one disclosed in Patent Document 1 is known.
Japanese Patent Laid-Open No. 11-50984

  However, in the scroll type fluid machine disclosed in Patent Document 1, when the balance weight is lifted from the end surface of the inner end large diameter portion of the rotating shaft, the lower surface of the head of the lift prevention pin and the upper surface of the balance weight are separated from each other. There was a risk that a collision sound would be generated even though the collision occurred.

  The present invention has been made in view of the above circumstances, and provides a scroll type fluid machine that can eliminate a collision sound generated when the lower surface of the head of the anti-lifting pin collides with the upper surface of the balance weight. The purpose is to do.

In order to solve the above problems, the present invention employs the following means.
In the scroll type fluid machine according to the present invention, the fixed scroll and the orbiting scroll, each of which has a spiral wall body standing on the inner surface of each end plate, are eccentric with respect to each other and meshed with each other out of phase. A balance weight is fixed to a drive bush that is rotatably fitted inside a boss projecting from the center of the outer surface of the revolving end plate, and the drive bush is linked to a rotating shaft via a turning radius variable mechanism. The head of the anti-lifting pin is a scroll type fluid machine formed by freely penetrating the hole formed in the balance weight and having its tip engaged with the large inner diameter portion of the rotating shaft. An elastic member is disposed between the lower surface of the portion and the upper surface of the balance weight

  According to the scroll type fluid machine of the present invention, the elastic member is provided between the lower surface of the head of the anti-lifting pin and the upper surface of the balance weight, and the balance weight is provided on the inner end large diameter portion of the rotating shaft. Since the elastic member is deformed (collapsed) when floating from the end surface, it is possible to prevent the lower surface of the head of the anti-lifting pin from colliding (contacting) with the upper surface of the balance weight. Further, a slight collision noise can be eliminated by collision between the lower surface of the head of the anti-lifting pin and the upper surface of the balance weight.

  In the scroll type fluid machine according to the present invention, the fixed scroll and the orbiting scroll, each of which has a spiral wall body standing on the inner surface of each end plate, are eccentric with respect to each other and meshed with each other out of phase. A balance weight is fixed to a drive bush that is rotatably fitted inside a boss projecting from the center of the outer surface of the revolving end plate, and the drive bush is linked to a rotating shaft via a turning radius variable mechanism. In this scroll type fluid machine, an elastic member is disposed between the lower surface of the balance weight and the end surface of the inner end large-diameter portion of the rotating shaft.

According to the scroll type fluid machine of the present invention, there is no possibility that the elastic member is deformed (collapsed) when the balance weight is about to float from the end surface of the inner end large diameter portion of the rotating shaft. It can be used for a long time, the maintenance / inspection interval of the elastic member can be extended, and the reliability can be improved.
Further, by providing an elastic member between the lower surface of the balance weight and the end surface of the inner end large diameter portion of the rotating shaft, the lower surface of the head of the anti-lifting pin and the upper surface of the balance weight are always in contact (contact). Since the bottom surface of the head of the lift prevention pin and the top surface of the balance weight can be prevented from colliding (contacting), the bottom surface of the head of the lift prevention pin and the balance weight It is possible to eliminate the collision sound that is slightly generated by the collision with the upper surface.

  In the scroll type fluid machine, the bottom surface of the head of the anti-lifting pin, which freely pierces through the hole formed in the balance weight and whose tip is engaged with the large-diameter portion of the inner end of the rotating shaft, More preferably, a low friction member is disposed between the balance weight and the upper surface of the balance weight.

  According to such a scroll type fluid machine, the balance weight can be smoothly slid in the radial direction.

  In the scroll type fluid machine according to the present invention, the fixed scroll and the orbiting scroll, each of which has a spiral wall body standing on the inner surface of each end plate, are eccentric with respect to each other and meshed with each other out of phase. A balance weight is fixed to a drive bush that is rotatably fitted inside a boss projecting from the center of the outer surface of the revolving end plate, and the drive bush is linked to a rotating shaft via a turning radius variable mechanism. A scroll-type fluid machine comprising: a hole formed in the balance weight; and a lift that passes freely through the hole and is engaged with the large-diameter portion of the rotating shaft. An elastic member is disposed between the shaft portion of the prevention pin, and between the upper surface of the balance weight and the lower surface of the head portion of the lifting prevention pin, and the lower surface of the balance weight, and the rotation Between the end face of the inner end large-diameter portion of which is disposed a low-friction member.

According to the scroll type fluid machine of the present invention, the low friction member provided between the lower surface of the head of the lifting prevention pin and the upper surface of the balance weight is always in contact (contact) with the lifting prevention pin and the balance weight. ) And the lower surface of the head of the anti-lifting pin and the upper surface of the balance weight can be prevented from colliding with (contacting) the lower surface of the head of the anti-lifting pin and the balance weight. It is possible to eliminate a slight collision noise generated by the collision with the upper surface of the glass.
Moreover, since the slide of the balance weight in the radial direction is absorbed by the deformation (collapse) of the elastic member, the distance between the tooth surfaces at the time of stopping can be controlled, and the restart is performed. It is possible to prevent start-up failures and abnormal sounds.

  In the scroll type fluid machine, it is more preferable that the elastic member and the low friction member are configured as a single body.

  According to such a scroll type fluid machine, the number of steps in the assembly process can be reduced, the working time required for the assembly process can be reduced, and the manufacturing cost can be reduced.

  In the scroll type fluid machine according to the present invention, the fixed scroll and the orbiting scroll, each of which has a spiral wall body standing on the inner surface of each end plate, are eccentric with respect to each other and meshed with each other out of phase. A balance weight is fixed to a drive bush that is rotatably fitted inside a boss projecting from the center of the outer surface of the revolving end plate, and the drive bush is linked to a rotating shaft via a turning radius variable mechanism. A scroll-type fluid machine comprising: a hole formed in the balance weight; and a lift that passes freely through the hole and is engaged with the large-diameter portion of the rotating shaft. Between the shaft portion of the prevention pin, between the upper surface of the balance weight and the lower surface of the head portion of the lifting prevention pin, and between the lower surface of the balance weight and the end surface of the inner end large diameter portion of the rotary shaft During, the elastic member is disposed.

According to the scroll type fluid machine of the present invention, elasticity is provided between the lower surface of the head of the lifting prevention pin and the upper surface of the balance weight, and between the lower surface of the balance weight and the end surface of the inner end large diameter portion of the rotating shaft. When the balance weight is about to lift from the end surface of the inner end large-diameter portion of the rotating shaft, the elastic member deforms (collapses) and balances with the lower surface of the head of the lift prevention pin. Since it is possible to prevent the upper surface of the weight from colliding (contacting), it is possible to eliminate a slight collision noise generated by the collision between the lower surface of the head of the lifting prevention pin and the upper surface of the balance weight. Can do.
Further, an elastic member is also provided between the inner peripheral surface of the balance weight hole and the outer peripheral surface of the shaft portion of the lifting prevention pin. The elastic member is slid in the radial direction of the balance weight. Since it is absorbed by being deformed (crushed), it is possible to control the distance between the tooth surfaces at the time of stopping, and to prevent start-up failure and abnormal noise at the time of restart.

  In the scroll type fluid machine according to the present invention, the fixed scroll and the orbiting scroll, each of which has a spiral wall body standing on the inner surface of each end plate, are eccentric with respect to each other and meshed with each other out of phase. A balance weight is fixed to a drive bush that is rotatably fitted inside a boss projecting from the center of the outer surface of the revolving end plate, and the drive bush is linked to a rotating shaft via a turning radius variable mechanism. In this scroll type fluid machine, an elastic member is disposed between the lower surface of the balance weight and the end surface of the inner end large diameter portion of the rotating shaft.

According to the scroll type fluid machine of the present invention, there is no possibility that the elastic member is deformed (collapsed) when the balance weight is about to float from the end surface of the inner end large diameter portion of the rotating shaft. It can be used for a long time, the maintenance / inspection interval of the elastic member can be extended, and the reliability can be improved.
Further, by providing an elastic member between the lower surface of the balance weight and the end surface of the inner end large diameter portion of the rotating shaft, the lower surface of the head of the anti-lifting pin and the upper surface of the balance weight are always in contact (contact). Since the bottom surface of the head of the lift prevention pin and the top surface of the balance weight can be prevented from colliding (contacting), the bottom surface of the head of the lift prevention pin and the balance weight It is possible to eliminate the collision sound that is slightly generated by the collision with the upper surface.

  In the scroll type fluid machine, it is more preferable that the surface of the elastic member is coated with a low friction material.

  According to such a scroll type fluid machine, the balance weight can be smoothly slid in the radial direction.

  In the scroll type fluid machine, it is more preferable that a low friction material is coated on a lower surface of the head of the lifting prevention pin.

  According to such a scroll type fluid machine, the balance weight can be smoothly slid in the radial direction.

  According to the present invention, there is an effect that it is possible to eliminate a collision sound that is slightly generated by the collision between the lower surface of the head of the lifting prevention pin and the upper surface of the balance weight.

Hereinafter, a first embodiment of a scroll type fluid machine (hereinafter referred to as a “scroll type compressor”) according to the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a longitudinal sectional view of a scroll compressor according to the present embodiment, and FIG. 2 is an enlarged view of a main part of FIG.

  As shown in FIG. 1, the scroll compressor 10 according to the present embodiment includes a housing 11 having a sealed space m therein, and a refrigerant gas (fluid) disposed in the housing 11 and taken into the sealed space m. The main components are a scroll compression mechanism 12 that compresses the scroll compression mechanism 12, a rotary shaft 13 that drives the scroll compression mechanism 12, and a drive unit that drives the scroll compression mechanism 12 to revolve.

  The housing 11 includes a front housing 14 and a rear housing 15, which are combined and then coupled with a plurality of bolts (not shown) to form a sealed space m inside. ing. Reference numeral 16 denotes a single O-ring that seals the joint between the front housing 14 and the rear housing 15 to keep the sealed space m sealed. Further, a thrust plate 14 a that matches the end surface is provided on the end surface of the front housing 14.

A suction port (not shown) for sucking refrigerant gas is formed on the front side of the rear housing 15 so as to communicate with the sealed space m. A scroll compression mechanism is provided on the upper rear side of the rear housing 15. 12, a discharge port 15a is formed through which compressed refrigerant gas is discharged after the lubricating oil in the refrigerant gas is separated by an oil separation chamber (not shown). Further, an oil reservoir chamber 18 (oil storage portion) that stores the lubricating oil separated by the oil separation chamber is formed on the discharge side (high pressure side) of the rear housing 15.
The oil separation chamber only needs to have an oil separation function, such as a centrifugal separation type, so long as the separated oil is led to the oil reservoir chamber 18.

The scroll compression mechanism 12 includes a fixed scroll 21 and a turning scroll 22.
The fixed scroll 21 includes a fixed end plate 21a and a spiral wall body 21b erected on the inner surface thereof, and a discharge port 21c is formed at the center of the fixed end plate 21a. The discharge port 21c is opened and closed by a discharge valve (not shown) attached to the rear surface (back surface) of the fixed end plate 21a via a bolt (not shown).
A communication path (lubricating oil path) 23 that connects the bottom of the oil reservoir 18 and the suction side bottom of the sealed space m is formed at the lower end of the fixed scroll 21. The filter 24 and the spiral pin 25 for flow rate adjustment are arranged from the upstream side.

The orbiting scroll 22 includes an orbiting end plate 22a and a spiral wall body 22b standing on the inner surface thereof. A drive bush 31 is rotatably fitted through a needle bearing 32 in a boss 22c erected on the outer surface of the swivel end plate 22a, and a hole formed in the drive bush 31 is rotated. An eccentric pin 13a protruding from one end of the shaft 13 is slidably fitted. A plurality of compression chambers C are formed by causing the fixed scroll 21 and the orbiting scroll 22 to be eccentric from each other by a predetermined distance and engaging with each other while shifting the angle by 180 degrees.
Further, an Oldham ring (spinning prevention mechanism) 33 is provided between the orbiting scroll 22 and the front housing 14, and the orbiting scroll 22 does not rotate around the drive bush 31 when the rotating shaft 13 is rotated. It is like that. Therefore, when the rotary shaft 13 is rotated, the orbiting scroll 22 does not rotate but only performs a revolving orbiting motion. Further, a balance weight 34 is fixed to the drive bush 31 so as to cancel the centrifugal force accompanying the revolution of the orbiting scroll 22.

The rotating shaft 13 is a rotor shaft that rotates about its axis by a driving mechanism (not shown) such as an engine or an electric motor, and the above-described eccentric pin 13a having an eccentric axis is projected from the tip of one end thereof. ing. The rotating shaft 13 is supported by a first bearing 35 and a second bearing 36 provided on the front housing 14 side so as to be rotatable around the axis.
Reference numeral 37 denotes a single O-ring that seals the joint between the fixed scroll 21 and the rear housing 15 to keep the sealed space m sealed.

On the other hand, the driving force from the engine, the electric motor or the like is transmitted or not transmitted to the rotating shaft 13 via the electromagnetic clutch 40.
The electromagnetic clutch 40 is composed mainly of a clutch bearing 41, a drive rotor 42, a coil 43, a cover 44, a hub 45, a leaf spring 46, pins 47 and 48, and an armature plate 49. It is.
The clutch bearing 41 is press-fitted into the outer peripheral surface of the nose portion 14a (to the extent that it is driven by a press) so that the inner peripheral surface of the inner ring and the outer peripheral surface of the nose portion 14a of the front housing 14 are in close contact with each other.

The drive rotor 42 is attached to the outer peripheral surface of the outer ring of the clutch bearing 41 so that the inner peripheral surface thereof is in close contact with the outer peripheral surface of the outer ring of the clutch bearing 41. Further, the drive rotor 42 incorporates coils 43, and an armature plate 49 is disposed at a position facing the coils 43. A current flows through these coils 43 based on an output signal from a controller (not shown).
The hub 45 is attached to the tip of the other end of the rotating shaft 13 via a bolt 50 and a stopper 51.

One end of each of the cover 44 and the leaf spring 46 is attached to a flange portion of the hub 45 via a pin 48, and an armature plate 49 is attached to the other end of the leaf spring 46 via a pin 47. It has been.
Further, a seal (shaft seal device) 54 provided with a lip seal 53 is provided in the through hole 14b located on the radially inner side of the nose portion 14a, thereby leaking (outflowing) refrigerant from the through hole 14b. ) Is prevented.

In the electromagnetic clutch 40 having such a configuration, the drive rotor 42 is connected to a drive source such as an engine or an electric motor via a V belt or the like (not shown). The rotor 42 is always rotated.
When a current is passed through the coil 43 based on an output signal from a controller (not shown), the armature plate 49 comes into close contact with the drive rotor 42 against the elastic force of the leaf spring 46, and the drive rotor 42 rotates. The armature plate 49, the pin 47, the leaf spring 46, the pin 48, and the hub 45 are transmitted in this order to the rotating shaft 13 and the rotating shaft 13 rotates. When the energization of the coil 43 is stopped, the armature plate 49 is separated from the drive rotor 42 by the restoring force of the leaf spring 46, and the power transmission to the rotating shaft 13 is interrupted.

  On the other hand, in the scroll compressor 10, when the electromagnetic clutch 40 is engaged, the driving force from the engine, the electric motor or the like is transmitted to the rotating shaft 13 and the rotating shaft 13 is rotated. This rotation is the eccentric pin 13a, the drive This is transmitted to the orbiting scroll 22 of the scroll compression mechanism 12 via the bush 31 and the boss 22c. The orbiting scroll 22 is configured to perform a revolving orbiting motion on a circular orbit having a revolution orbiting radius as a radius while being prevented from rotating by the Oldham ring 33.

Then, the refrigerant gas enters the sealed space m of the housing 11 through the suction port, and is sucked into the compression chamber C of the scroll compression mechanism 12 through a path not shown. Then, as the volume of the compression chamber C decreases due to the revolving orbiting motion of the orbiting scroll 33, the refrigerant gas reaches the center while being compressed, and the refrigerant containing the lubricating oil is led from the discharge port 21c to the oil separation chamber. , Swirled along the inner wall surface of the oil separation chamber. As a result, the lubricating oil mixed in the refrigerant falls down while turning along the inner wall surface of the oil separation chamber by the centrifugal separation action and is stored in the oil reservoir chamber 18, while the lubricating oil is separated. The refrigerant is discharged to the outside through the inside of the inner cylinder and the discharge port 15a of the rear housing 15.
From the viewpoint of the refrigerant pressure, the side provided with the discharge port 21c, the oil sump chamber 18 and the like in the scroll compressor 10 is the high pressure side, and the side provided with the suction port and the first bearing 35 is the low pressure side.

As shown in FIG. 2, in the present embodiment, a hole 34a is formed in the balance weight 34, and a lift prevention pin (falling prevention pin) that freely passes through the hole 34a. ) 38 is passed. The shaft portion 38 a of the lifting prevention pin 38 is press-fitted and fixed in a hole 13 c formed in the inner end large-diameter portion 13 b of the rotating shaft 13. An elastic member (buffer member) 39 is disposed between the lower surface of the head portion 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34, whereby the lower surface of the head portion 38b of the lifting prevention pin 38. And the surface of the elastic member 39 are brought into sliding contact with each other, and the upper surface of the balance weight 34 and the surface of the elastic member 39 are brought into sliding contact so that the balance weight 34 is lifted from the end surface of the inner end large-diameter portion 13b of the rotary shaft 13. This prevents the orbiting scroll 22 from tilting.
Examples of the elastic member 39 include an O-ring made of nitrile rubber or the like, a ring-shaped member made of Teflon (registered trademark), or the like.

  According to the scroll compressor 10 according to the present embodiment, the elastic member 39 is provided between the lower surface of the head 38 b of the lifting prevention pin 38 and the upper surface of the balance weight 34, and the balance weight 34 is connected to the rotary shaft 13. When an attempt is made to lift from the end surface of the inner end large-diameter portion 13b, the elastic member 39 is deformed (collapsed), so that the lower surface of the head 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34 collide with each other. Since it is possible to prevent contact (contact), it is possible to eliminate a collision sound that is slightly generated by the collision between the lower surface of the head portion 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34.

A second embodiment of the scroll compressor according to the present invention will be described with reference to FIG. FIG. 3 is an enlarged view of a main part of the scroll compressor according to the present embodiment, which is the same as FIG.
The scroll compressor according to this embodiment is the first embodiment described above in that an elastic member 39 is provided between the lower surface of the balance weight 34 and the end surface of the inner end large diameter portion 13b of the rotary shaft 13. Different from that of form. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

  As shown in FIG. 3, in the present embodiment, an elastic member 39 is disposed between the lower surface of the balance weight 34 and the end surface of the inner end large diameter portion 13 b of the rotary shaft 13, thereby The lower surface and the surface of the elastic member 39 are slidably contacted, the end surface of the inner end large-diameter portion 13b of the rotating shaft 13 and the surface of the elastic member 39 are slidably contacted with the lower surface of the head 38b of the anti-lifting pin 38. By making sliding contact with the upper surface of the weight 34, the balance weight 34 is prevented from floating from the end surface of the inner end large diameter portion 13 b of the rotating shaft 13, and tilting of the orbiting scroll 22 is prevented.

According to the scroll compressor according to the present embodiment, there is no possibility that the elastic member 39 is deformed (collapsed) when the balance weight 34 tries to lift from the end face of the inner end large diameter portion 13b of the rotary shaft 13. The elastic member 39 can be used over a long period of time, the maintenance / inspection interval of the elastic member 39 can be extended, and the reliability can be improved.
Further, by providing an elastic member 39 between the lower surface of the balance weight 34 and the end surface of the inner end large diameter portion 13b of the rotary shaft 13, the lower surface of the head 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34 Can always be kept in contact (contact), and the lower surface of the head 38b of the lift prevention pin 38 and the upper surface of the balance weight 34 can be prevented from colliding (contacting). It is possible to eliminate a slight collision sound generated by the collision between the lower surface of the head 38b of the pin 38 and the upper surface of the balance weight 34.

A third embodiment of the scroll compressor according to the present invention will be described with reference to FIG. FIG. 4 is an enlarged view of a main part of the scroll compressor according to the present embodiment, which is the same as FIG. 2 and FIG.
The scroll compressor according to this embodiment is the second embodiment described above in that the low friction member 60 is provided between the lower surface of the head portion 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34. Different from that. Since other components are the same as those of the second embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 2nd Embodiment mentioned above.

As shown in FIG. 4, in the present embodiment, a low friction member 60 is disposed between the lower surface of the head portion 38 b of the lifting prevention pin 38 and the upper surface of the balance weight 34, and the lower surface of the balance weight 34 and the rotary shaft 13. The elastic member 39 is disposed between the inner end large-diameter portion 13b and the lower end of the head 38b of the anti-lifting pin 38 and the upper surface of the low friction member 60. The lower surface of the low friction member 60 is in sliding contact with the lower surface of the balance weight 34 and the surface of the elastic member 39 so that the surface of the elastic member 39 and the inner end large-diameter portion 13b of the rotary shaft 13 are in contact with each other. By making sliding contact with the end face, the balance weight 34 is prevented from floating from the end face of the inner end large-diameter portion 13b of the rotating shaft 13, so that the orbiting scroll 22 is prevented from tilting. Going on.
The low friction member 60 is, for example, a ring-shaped member made of Teflon (registered trademark) or a metal plate such as an iron plate coated with a low friction material such as Teflon (registered trademark). Can be mentioned.

According to the scroll compressor according to the present embodiment, since the low friction member 60 is provided between the lower surface of the head 38 b of the lifting prevention pin 38 and the upper surface of the balance weight 34, the balance weight 34 is moved in the radial direction. The slide (sliding) can be made smoother.
Other functions and effects are the same as those of the above-described second embodiment, and thus description thereof is omitted here.

A scroll compressor according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is an enlarged view of a main part of the scroll compressor according to the present embodiment, which is the same as FIGS. 2 to 4.
In the scroll compressor according to the present embodiment, an elastic member 65 is provided between the hole 34a of the balance weight 34 and the shaft portion 38a of the lifting prevention pin 38, and the bottom surface of the head 38b of the lifting prevention pin 38 and the balance weight. 34 is different from that of the above-described embodiment in that low friction members 60 are respectively provided between the upper surface 34 and the elastic member 65 and the end surface of the inner end large diameter portion 13b of the rotary shaft 13. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as embodiment mentioned above.

  As shown in FIG. 5, the elastic member 65 has a shape (hollow cylindrical shape) that fills a space formed between the inner peripheral surface of the hole 34 a of the balance weight 34 and the outer peripheral surface of the shaft portion 38 a of the lifting prevention pin 38. The shape of the member has a flange portion at one end thereof, and is made of, for example, nitrile rubber or Teflon (registered trademark).

  In the present embodiment, the low friction member 60 is provided between the lower surface of the head portion 38 b of the lifting prevention pin 38 and the upper surface of the balance weight 34 and between the elastic member 65 and the end surface of the inner end large diameter portion 13 b of the rotary shaft 13. Are provided, and the elastic member 39 is disposed between the low friction members 60, thereby bringing the lower surface of the head 38 b of the anti-lifting pin 38 and the upper surface of the low friction member 60 into sliding contact with each other. And the upper surface of the balance weight 34 and the upper surface of the elastic member 65 are brought into sliding contact with each other, and the lower surface of the elastic member 65 and the upper surface of the low friction member 60 are brought into sliding contact with each other. By making sliding contact with the end surface of the inner end large-diameter portion 13b, the balance weight 34 is prevented from floating from the end surface of the inner end large-diameter portion 13b of the rotating shaft 13, and the orbiting scroll 2 Tilting of the is adapted to be prevented.

According to the scroll compressor according to the present embodiment, the elastic member 65 and the end surface of the inner end large-diameter portion 13b of the rotary shaft 13 are provided between the lower surface of the head portion 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34. Since the low friction members 60 are respectively provided between them, the balance weight 34 can be smoothly slid in the radial direction.
Other functions and effects are the same as those of the above-described embodiment, and thus description thereof is omitted here.

In the present embodiment, two low friction members and one elastic member are integrally made of the same material (for example, nitrile rubber), and the sliding surface (lifting prevention pin 38) of the portion to be the low friction member is produced. The surface facing the lower surface of the head 38b and the surface facing the end surface of the inner end large-diameter portion 13b of the rotary shaft 13) are coated with a low friction material such as Teflon (registered trademark) to simplify the structure. You may make it plan.
Thereby, the man-hour of an assembly process can be reduced, the working time which an assembly process requires can be reduced, and reduction of manufacturing cost can be aimed at.
Further, since the slide (sliding) of the balance weight 34 in the radial direction is absorbed by the deformation (collapse) of the low friction member and the elastic member, the distance between the tooth surfaces at the time of stopping is controlled. It is possible to prevent start-up failure or abnormal sound during restart.

A scroll compressor according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an enlarged view of a main part of the scroll compressor according to the present embodiment, which is the same as FIG. 2 to FIG.
The scroll compressor according to this embodiment is different from that of the above-described embodiment in that an elastic member 70 is provided instead of the elastic member 39. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as embodiment mentioned above.

  As shown in FIG. 6, the elastic member 70 is formed between the lower surface of the head 38 b of the lifting prevention pin 38 and the upper surface of the balance weight 34, the inner peripheral surface of the hole 34 a of the balance weight 34, and the shaft portion of the lifting prevention pin 38. 38a and a shape that fills the space formed between the lower surface of the balance weight 34 and the end surface of the inner end large-diameter portion 13b of the rotary shaft 13 (flanges at both ends of the hollow cylindrical member). For example, it is made of nitrile rubber.

  In the present embodiment, between the lower surface of the head 38 b of the lifting prevention pin 38 and the upper surface of the balance weight 34, the inner peripheral surface of the hole 34 a of the balance weight 34 and the outer peripheral surface of the shaft portion 38 a of the lifting prevention pin 38. The elastic member 70 is disposed between and the space formed between the lower surface of the balance weight 34 and the end surface of the inner end large-diameter portion 13b of the rotary shaft 13, whereby the head 38 b of the anti-lifting pin 38. The bottom surface of the elastic member 70 is brought into sliding contact with the upper surface of the elastic member 70, and the lower surface of the elastic member 65 is brought into sliding contact with the end surface of the inner end large-diameter portion 13 b of the rotating shaft 13. Lifting from the end face of the end large diameter portion 13b is prevented, and tilting of the orbiting scroll 22 is prevented.

According to the scroll compressor according to the present embodiment, between the lower surface of the head 38 b of the lifting prevention pin 38 and the upper surface of the balance weight 34, and between the lower surface of the balance weight 34 and the inner end large diameter portion 13 b of the rotary shaft 13. When the elastic member 70 is provided between the end surface and the balance weight 34 tries to lift from the end surface of the inner end large diameter portion 13b of the rotary shaft 13, the elastic member 70 is deformed (collapsed). Since it is possible to prevent the lower surface of the head 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34 from colliding (contacting), the lower surface of the head 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34 are prevented. It is possible to eliminate the collision sound that is slightly generated by the collision.
An elastic member 70 is also provided between the inner peripheral surface of the hole 34a of the balance weight 34 and the outer peripheral surface of the shaft portion 38a of the lifting prevention pin 38, and the balance weight 34 is slid in the radial direction (sliding). ) Is absorbed when the elastic member is deformed (crushed), so the distance between the tooth surfaces at the time of stopping can be controlled, and start-up failure and abnormal noise at the time of restart can be prevented. .

In the above-described embodiment, as shown in FIG. 7, it is more preferable that a low friction material 75 such as Teflon (registered trademark) is coated on the lower surface of the head portion 38 b of the lifting prevention pin 38.
Thereby, the slide (sliding) of the balance weight 34 in the radial direction can be made smoother.

  Further, the present invention is not limited to the above-described embodiment. For example, as shown in FIG. 8, between the lower surface of the balance weight 34 and the end surface of the inner end large diameter portion 13 b of the rotary shaft 13. An elastic member 80 may be provided. That is, by providing the elastic member 80 between the lower surface of the balance weight 34 and the end surface of the inner end large diameter portion 13b of the rotating shaft 13, the lower surface of the balance weight 34 and the surface of the elastic member 80 are slidably contacted to rotate. The end face of the inner end large diameter portion 13b of the shaft 13 and the surface of the elastic member 80 are brought into sliding contact with each other, and the lower surface of the head 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34 are brought into sliding contact with each other. Is prevented from floating from the end face of the inner end large-diameter portion 13b of the rotating shaft 13, and the tilting of the orbiting scroll 22 is prevented.

Then, according to the scroll compressor according to the present embodiment, when the balance weight 34 tries to lift from the end surface of the inner end large diameter portion 13b of the rotating shaft 13, the elastic member 80 may be deformed (crushed). Therefore, the elastic member 80 can be used over a long period of time, the maintenance / inspection interval of the elastic member 80 can be extended, and the reliability can be improved.
Further, by providing an elastic member 80 between the lower surface of the balance weight 34 and the end surface of the inner end large-diameter portion 13b of the rotary shaft 13, the lower surface of the head 38b of the lifting prevention pin 38 and the upper surface of the balance weight 34 Can always be kept in contact (contact), and the lower surface of the head 38b of the lift prevention pin 38 and the upper surface of the balance weight 34 can be prevented from colliding (contacting). It is possible to eliminate a slight collision sound generated by the collision between the lower surface of the head 38b of the pin 38 and the upper surface of the balance weight 34.

Furthermore, in the above-described embodiment, when the elastic members 39, 70, 80 are made of nitrile rubber or the like, it is more preferable that the surface is coated with a low friction material such as Teflon (registered trademark).
Thereby, the slide (sliding) of the balance weight 34 in the radial direction can be made smoother.

It is a longitudinal section of the scroll type compressor concerning a 1st embodiment of the present invention. It is a principal part enlarged view of the scroll compressor shown in FIG. It is a principal part enlarged view of the scroll compressor which concerns on 2nd Embodiment of this invention, Comprising: It is a figure similar to FIG. It is a principal part enlarged view of the scroll compressor which concerns on 3rd Embodiment of this invention, Comprising: It is a figure similar to FIG. 2 and FIG. It is a principal part enlarged view of the scroll compressor which concerns on 4th Embodiment of this invention, Comprising: It is a figure similar to FIG. FIG. 10 is an enlarged view of a main part of a scroll compressor according to a fifth embodiment of the present invention, which is the same as FIGS. 2 to 5. It is a principal part enlarged view of the scroll compressor which concerns on other embodiment of this invention. It is a principal part enlarged view of the scroll compressor which concerns on another embodiment of this invention, Comprising: It is a figure similar to FIG.

Explanation of symbols

10 Scroll type compressor (scroll type fluid machine)
13 Rotating shaft 13b Inner end large-diameter portion 21 Fixed scroll 21a Fixed end plate 21b Swirl wall 22 Swivel scroll 22a Swivel end plate 22b Swirl wall 22c Boss 31 Drive bush 34 Balance weight 34a Hole 38 Lifting prevention pin 38a Shaft 38b Head 39 Elastic member 60 Low friction member 65 Elastic member 70 Elastic member 75 Low friction material 80 Elastic member

Claims (9)

The fixed scroll and the orbiting scroll, each of which has a spiral wall on the inner surface of each end plate, are offset from each other and meshed with a phase shift, and project from the center of the outer surface of the orbiting end plate of the orbiting scroll. A scroll type fluid machine in which a balance weight is fixed to a drive bushing rotatably fitted inside a formed boss, and the drive bushing is linked to a rotating shaft via a turning radius variable mechanism. ,
A lower surface of the head of the anti-lifting pin, which freely passes through a hole formed in the balance weight and whose tip is engaged with the large-diameter portion of the inner end of the rotary shaft; and an upper surface of the balance weight An elastic member is disposed between the scroll fluid machines. The fixed scroll and the orbiting scroll, each of which has a spiral wall on the inner surface of each end plate, are offset from each other and meshed with a phase shift, and project from the center of the outer surface of the orbiting end plate of the orbiting scroll. A scroll type fluid machine in which a balance weight is fixed to a drive bushing rotatably fitted inside a formed boss, and the drive bushing is linked to a rotating shaft via a turning radius variable mechanism. ,
A scroll type fluid machine, wherein an elastic member is disposed between a lower surface of the balance weight and an end surface of an inner end large diameter portion of the rotating shaft.   A lower surface of the head of the anti-lifting pin, which freely passes through a hole formed in the balance weight and whose tip is engaged with the large-diameter portion of the inner end of the rotary shaft; and an upper surface of the balance weight The scroll type fluid machine according to claim 2, wherein a low friction member is disposed between the two. The fixed scroll and the orbiting scroll, each of which has a spiral wall on the inner surface of each end plate, are offset from each other and meshed with a phase shift, and project from the center of the outer surface of the orbiting end plate of the orbiting scroll. A scroll type fluid machine in which a balance weight is fixed to a drive bushing rotatably fitted inside a formed boss, and the drive bushing is linked to a rotating shaft via a turning radius variable mechanism. ,
An elastic member between the hole formed in the balance weight and the shaft portion of the anti-lift pin that penetrates freely in the hole and whose tip is engaged with the large-diameter portion of the inner end of the rotating shaft Is placed,
A low friction member is disposed between the upper surface of the balance weight and the lower surface of the head of the lifting prevention pin, and between the lower surface of the balance weight and the end surface of the inner end large diameter portion of the rotation shaft. A scroll type fluid machine characterized by comprising:   The scroll type fluid machine according to claim 4, wherein the elastic member and the low friction member are configured as a single body. The fixed scroll and the orbiting scroll, each of which has a spiral wall on the inner surface of each end plate, are offset from each other and meshed with a phase shift, and project from the center of the outer surface of the orbiting end plate of the orbiting scroll. A scroll type fluid machine in which a balance weight is fixed to a drive bushing rotatably fitted inside a formed boss, and the drive bushing is linked to a rotating shaft via a turning radius variable mechanism. ,
The balance is formed between the hole formed in the balance weight and the shaft portion of the anti-lifting pin that freely passes through the hole and whose tip is engaged with the large-diameter portion of the inner end of the rotating shaft. An elastic member is disposed between the upper surface of the weight and the lower surface of the head of the lifting prevention pin, and between the lower surface of the balance weight and the end surface of the inner end large-diameter portion of the rotating shaft. A scroll type fluid machine. The fixed scroll and the orbiting scroll, each of which has a spiral wall on the inner surface of each end plate, are offset from each other and meshed with a phase shift, and project from the center of the outer surface of the orbiting end plate of the orbiting scroll. A scroll type fluid machine in which a balance weight is fixed to a drive bushing rotatably fitted inside a formed boss, and the drive bushing is linked to a rotating shaft via a turning radius variable mechanism. ,
A scroll type fluid machine, wherein an elastic member is disposed between a lower surface of the balance weight and an end surface of an inner end large diameter portion of the rotating shaft.   The scroll type fluid machine according to any one of claims 1 to 7, wherein a surface of the elastic member is coated with a low friction material.   The scroll type fluid machine according to any one of claims 1 to 8, wherein a low friction material is coated on a lower surface of a head portion of the lifting prevention pin.

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